Iggy is calling him out.

With the news of Britney Spears' appeal being denied, celebrities have been continuously showing their support for the singer. The latest to show hers is fellow artist Iggy Azalea, but she went into a little more detail than others had. Taking to Twitter, Iggy revealed that she witnessed just how bad the conservatorship was for Britney after the pair worked together back in 2015. She revealed that Jamie Spears, Britney's father who controls the conservatorship, forced the rapper to sign an NDA otherwise she would not be allowed to perform with his daughter. She said: "Its basic human decency to at the very least remove a person Britney has identified as abusive from her life. This should be illegal. "During the time we worked together in 2015, I personally witnessed the same behavior Britney detailed in regards to her father last week and I just want to back her up & tell the world that: She is not exaggerating or lying." The pair were set to perform "Pretty Girls" at the Billboard Music Awards when Iggy said she witness the abuse. She added: "I saw her restricted from even the most bizarre & trivial things: like how many sodas she was allowed to drink. Why is that even Necessary? https://twitter.com/IGGYAZALEA/status/1410433707052204034 "Her father conveniently waited until literally moments before our BMAs performance when I was backstage in the dressing room & told me if I did not sign an NDA he would not allow me on stage" "The way he went about getting me to sign a contract, sounded similar to the tactics Britney spoke about last week in regards to her Las Vegas show." She then went on to call out Jamie directly for having a reputation for making people sign documents. She continued: "Jamie Spears has a habit of making people sign documents while under Duress it seems, and Britney Spears should not be forced to co-exist with that man when she's made it clear it is negatively impacting her mental health. This is not right at all."